Bug 2564058 (CVE-2026-119602) - CVE-2026-119602 libmspack: libmspack: Information disclosure via unchecked back-references in MS-ZIP decompressor
Summary: CVE-2026-119602 libmspack: libmspack: Information disclosure via unchecked ba...
Keywords:
Status: NEW
Alias: CVE-2026-119602
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-30 14:19 UTC by OSIDB Bzimport
Modified: 2026-11-02 03:08 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-10-30 14:19:47 UTC 
libmspack through 0.11alpha contains an uninitialized memory disclosure vulnerability in the MS-ZIP decompressor that allows attackers to leak heap data via unchecked back-reference distances. Attackers can supply a crafted MS-ZIP CAB file whose first block begins with a back-reference, causing cabd->extract() to write up to 32 KiB of stale heap memory into extracted output.
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